<script setup>

import Demo21 from "@/components/demo21.vue";
import {ref} from "vue";
const count=ref(100)
setTimeout(()=>{
  count.value++
},2000)
</script>

<template>
  <div class="container">
    父组件
    <p/>
    <demo21 message="普通 message" :count="count"/>
  </div>

</template>

<style scoped>
.container{
  background: #ff1111;
}
</style>